Hi John.

Check my website, the PDP-11/05 (11/10) page. The system in the rack has
a Perkin-Elmer. It is a combination of a non-removable with the upper
part a removable pack, *like* the RL cartridge.
The Centronics connectors go via a flat cable to BC11 cables and they
connect to the RK11 controller.
At least, it is like that in my system. The real RK05 and the
Perkin-Elmer
are daisy-chained as if they all were RK05's.
The capacity of the Perkin-Elmer makes it count for 4 devices, just like
the RK05/f counted as 2 consecutive devices.
I also have documentation of that drive. They exist in two versions
- front loader (like RK05) and - top loader (like RL01/02 etc).

- Henk, PA8PDP
www.pdp-11.nl


-----Original Message-----
From: owner-info-pdp11@village.org
To: Info-PDP11@village.org
Sent: 23-12-2004 18:23
Subject: PMDD-11B/SF1221 disk drive

I have a front-loader disk drive that someone gave me a while back,
which
I don't need. I've never heard of it, it's a bit shorter than an RK05
(but about the same footprint) and has a Perkin-Elmer tag that calls it
an SF1221, and also a Plessey tag that says PMDD-11B. I have no packs
for it, and I don't know what kind of controller it needs -- there's a
dual-height paddle card but it doesn't have nearly enough stuff on it
to be a controller, but maybe the drive itself is smarter than it looks.
Also various Centronics connectors. Condition is unknown, the front
panel
has slipped off its screws so the door mechanism doesn't operate
smoothly,
but nothing looks actually broken so I'll bet that could be put back
together.

Does anyone want this thing? Or at least can anyone tell me anything
about it? Free to a good home, currently located in Troy NY USA. It's
heavy for its size so shipping it is probably a bad idea, but not out of
the question. I often drive between Troy and central Mass. so I could
easily get it closer to some people's idea of civilization.

John Wilson
D Bit
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